Word Problems
Britney has 228 marbles.Alberto has 53 more marbles than Britney. How many marbles do they have in all?
509
145 + 10 =
155
Use an open number line to solve.
438 + 240 =
678
Use any strategy. Explain your reasoning.
212 + 487 =
699
Ryan works at a farm stand. He sells 157 eggs.Now he has 346 eggs. How many eggs did Ryan have before he sold some?
503
866 + 10 =
876
Draw place value blocks to help you solve.
639 + 143 =
782
Use any strategy. Explain your reasoning.
650 + 270 =
920
There are 192 ants on an ant farm. 397 more ants join the ant farm. How many ants are on the ant farm now? Use the number line to solve.
192 + 397= 589
372 + 100 =
472
Use an open number line to solve.
157 + 229 =
386
In July, 345 children go to a sports camp. In August, 236 children go to the camp. How many children go to the camp in all? Use the open number line to solve. Explain your work.
I start at 345 and add 200, then 30, and then 6. I land on 581, so 345 + 236 = 581.
Dina has 100 red counters.She has 326 blue counters and 10 green counters.How many red and blue counters does Dina have?
426
724 + 100 =
824
Find 229 + 461 using partial sums. In which order did you find partial sums?
690.
Ken and Mai play a video game. Ken scores 273 points. Mai scores 364 points. How many points do they score in all?Use any strategy.
Show your work and explain.
Sample work:
273+ 364= 500
500+130+7=637 points
I added hundreds, then tens, and then ones. Then I added the partial sums
There are 229 people at the football game. 108 more people arrive at the game. How many people are at the football game now?
337
653 + 100 =
753
Add using partial sums.
529 + 223 =
752
Tommy found 125 + 598. Since 598 is close to 600, he added 125 + 600 = 725. Then he subtracted 2 to get 723.
Why did Tommy subtract 2?
Tommy subtracted by 2 because he rounded up by 2 (598 + 2= 600)