Subtraction
321-116 =
205
63 + w = 75
W=
w=12
Round to the nearest 10.
267
270
614-322=
292
U + 249 = 312
U = 63
Round to the nearest 100
648
650
Which 2 numbers have a sum the closest to 700?
560
300
270
442
270 & 442
270 + 440 = 710
300+400=700
256-182=
74
____ + 16 = 3 x 10
14
Round to the nearest 10
671
670
Estimate by rounding to the nearest hundred to find the sum. 305 + 853
What is 1,200?
127 - 89 =
38
5 x 12 = ___ + 25
35
Round to the nearest 10 and 100
245
Nearest 100: 200
Nearest 10: 250
True or False
329 - 113 = 330 - 112
False
Constant difference says you need to do the same to both sides they added 1 to 329 and subtracted 1 from 113
345 + 656
1,001
500 - 214
286
___ + 22 = 32 +58
68
List 5 numbers that when rounded to the nearest 10 would round to 360
355,356,357,358,359,360,361,362,363,364
True or false
329+113 = 330+112
TRUE
You can move some from one of the addens to create a friendly number with the other
895 + 147
1,042