Word problems
Upon finishing the treehouse, Charlie’s mother served them freshly baked cookies. If Charlie ate 15 cookies, his father ate 10 and his mother only ate 5, please write an equation to show how many cookies were eaten in total?
Use a letter for the unknown quantity
15 + 10 + 5 = C
63 + w = 75
W=
w=12
Round to the nearest 10.
267
270
Sally counted 153 beads on her necklace. Jill had 35 more beads than sally on her necklace. How many beads are on both necklaces?
341 beads
U + 249 = 312
U = 63
Round to the nearest 100
648
650
Estimate by rounding to the nearest hundred to find the sum. 634 + 788
What is 1,400?
Andrew, Annie’s other friend, was assigned with the preparation of appetizers. He decided to bring 264 hotdogs, 167 cheese pops and 325 chicken nuggets. How many appetizers did Andrew bring in all?
756 appetizers
____ + 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?
To have a more stable treehouse, Charlie’s father decided to tie the corner posts of the house to the tree itself. He used 24 inches of rope for the first post, 20 inches on the second, 14 inches on the third and 12 inches on the fourth. He also had 15 feet of cable but did not use that. How many inches of rope were used?
70 inches of rope
5 x 12 = ___ + 25
35
Round to the nearest 10 and 100
245
Nearest 100: 200
Nearest 10: 250
345 + 656
1,001
While building the house, Charlie noticed that they were running out of nails, so he told his father he is going to buy some. If they still have 9 nails left and Charlie bought 2 boxes of nails, the big one containing 55 nails and the small one containing 31, how many nails will they have?
95 Nails
___ + 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
895 + 147
1,042