Your challenge is to use the numbers available (50, 75, 9, 8, 7 and 5) and the four operations (addition, subtraction, multiplication and division), to make the target number of 640.

Each card can only be used once. It may not be necessary to use all the cards.

How close to 640 can you get? How many different ways can you make 640? What is the most efficient way to make 640?

First I do 50+75=125 then they do 9+8=17 then I do 17+7=24 now I do is I add 125+24= 149 then I do 149 time 5 I get 745 take away 50 I get 695 I do 5+5= 10 I take away 10 =685 685 take away 5= 680 then I take way 50 is 630 now I do 5+5=10 now I do 630+10=640

75+50x5=625+9+7=641 I used the biggest numbers first then I x it to make 645 later I added 9 and 8 which was 642 but I took away the 8 and added 7 instead to make the closest number to 640

75x8=600 600+50=650 650-9=641 That is the closest I can get to 640 but I have made other different ways of making the number with only using these numbers 50,75,9,8,7,5.

i had 50 i times by 9 i got 450 then i calculated to get 225 then i added 450 225 then i got675 i took away 9 5 8 then i got 651

ReplyDeleteHow did you get 225 Marius?

Deletei think i calculated wrong

DeleteAdd 340 to 300 and you'll end up getting 640

ReplyDelete75+50=125 125X5=625 625+10 = 635

ReplyDeleteGreat Miguel, but can you get closer?

DeleteI can get to 639 that is how much I can get to

ReplyDeleteHow did you get 639 Timi?

Delete640-0=640

ReplyDelete640 divided by 1 =640

100 times 4=400+200+40=640

1,000 -500=500+140=640

Read the question carefully Chinemey. You can only use the following numbers: 50, 75, 9, 8, 7 and 5.

Delete50x12=600+50=650-5=645-5=640

ReplyDelete75x8=600+5+5+5+5+5+5+5+5=640

8x80=640

You can only use each of the numbers once Reo. How did you get 12?

Delete75×9=675 8+7=15 675-50=625+15=640

Delete320 + 320 = 640 I got 640 by halfing the number 640 which gave me 320 and adding 320 together that's how I got 640

ReplyDeleteRead the question again Adrian.

DeleteYou can't use 320

Delete530 +110= 640

ReplyDeleteFirst I do 50+75=125 then they do 9+8=17 then I do 17+7=24 now I do is I add 125+24= 149 then I do 149 time 5 I get 745 take away 50 I get 695 I do 5+5= 10 I take away 10 =685 685 take away 5= 680 then I take way 50 is 630 now I do 5+5=10 now I do 630+10=640

ReplyDelete75+50=125

ReplyDelete125x5=625

625+8=633

633+7=640

50X9=450 9X8=72 7X5=35 450+72=522 522+35=557 557+75=632

ReplyDelete50 x 7 + 30

ReplyDelete75+50x5=625+9+7=641

ReplyDeleteI used the biggest numbers first then I x it to make 645 later I added 9 and 8 which was 642 but I took away the 8 and added 7 instead to make the closest number to 640

70x9=630+8=638+5=643

ReplyDeleteFirst try 9x8x7+75+50=629

ReplyDeleteSecond try 75x9=675-50=625+15=640

8+7=15

540+100=640

ReplyDelete641-640

640 divide 1=640

740-100=640

100x4=400+200+4

75x8+50-9=641

ReplyDelete75+50=125

ReplyDelete125x5=625

8+7=15

625+15=640

Well done Reo! Are there any other ways of making 640?

Delete75+50=125

ReplyDelete125×5=625

625+8=633

633+7=640

75+25=125

ReplyDelete125×5=625

625+8=633

633+7=640

The closest I got was v

ReplyDelete641

75x8=600+50=650-9=641

75 + 25 = 125

ReplyDelete125×5=625

625+8=633

633+7=640

75×9=675 675-5×7=640

ReplyDeleteWe could try 300+300=600 now I am going to ad 40 to 600 600+40 will give you 640

ReplyDeleteLet's do 650-10 will give you 640.

ReplyDeleteYou could do 200+300=500 then 500+40=540 and I am going to add 540 to 100 540+100= 640

ReplyDelete75+50=125

ReplyDelete125x5=625

625+8=633

633+7=640

125x2.5+2.5+625+4+4+633+7=640

ReplyDelete75x9=675

ReplyDelete675-8=666

666-5=661

Can you get closer?

50x9=450

ReplyDelete450+75=525

9x8=72

525+72=597

7x5=35

597+35=632

That was the closest I got to but I'm going to keep on trying until I get to the answer!!

75x9=675

ReplyDelete675-7=668

668-8=660

50+75=125

ReplyDelete125x5=625

625+9=634

634+8=642

642+7=649

75x8=600

ReplyDelete600+50=650

650-9=641

50+75=125

ReplyDelete125x5=634

634+7=641

641+8=649

649-9=640

I got 640. I calculated 50+75=125×5=625+7=632+8=640

ReplyDelete75+50=125

ReplyDelete125x5=625

625+8=633

633+7=640

75x9=675

ReplyDelete675-50=625

625+7=632

632+8=640

100+25=125

ReplyDelete125 times 5=625

625+15=640

75x9=675

ReplyDelete675-50=620

8+7+5=20

620+20=640

1280 divided by2=640

ReplyDelete5x128=640

6x100=600+40=640

50x8=400 9+400=409 8-409=401

ReplyDelete75x8=600

ReplyDelete600+50=650

650-9=641

That is the closest I can get to 640 but I have made other different ways of making the number with only using these numbers 50,75,9,8,7,5.

75+25=125

ReplyDelete125×5=625

625+8=633

633+7=640

75x8=600

ReplyDelete600+50=650

650-9=640

600+40=640 Is An Ovias One 650-10=640 6x100=600+40=640 600+70=670-30=640 900-300=600+40=640 Well That's All I Have So Far.

ReplyDelete75x9=675

ReplyDelete7x5=35

675-35=640

75+50=125

ReplyDelete125x5=625

8+7=15

625+15=640

75+50=125

ReplyDelete125x5=625

8+7=15

625+15=640 or 75x9=675

7x5=35 675-35=640

31+33=64 5+5=10 64x10=640

ReplyDelete