Decomposing numbers
Decompose the number 54
50 + 4
Ms. Massoia has 15 Hershey kisses. Mrs. Desmarais gave her 23 more. How many Hershey kisses does Ms. Massoia have now?
10 + 5
20 + 3
______________
30 + 8 = 38
Johnathan has 12 pencils in his desk. Clayton has 25 pencils in his desk. How many pencils do they have in all?
12 + 25 = 37
Ms. Aliengena had 21 pumpkins at her house. She was given 13 more over the weekend. How many pumpkins does she have in all now?
21 + 13 = 34
Does the question "How many are in all?" give you a hint that you need to add or subtract?
Add
Decompose the number 134.
100 + 30 + 4
Mya had 45 colored pencils in her pencil case. She gave Gracie 22 colored pencils. How many colored pencils does she have left?
40 + 5
20 + 2
___________
20 + 3 = 23 colored pencils
Makayla and Harper were playing Jenga. There is 62 game pieces in all. They already pulled out 31 pieces from the tower. How many pieces are left in the tower?
62 - 31 = 31
Rory played video games for 65 minutes over the weekend. Grayson played 44 minutes of video games over the weekend. How many more minutes did Rory play than Grayson?
65 - 44 = 21
Does the question "How many more?" give you a hint that you need to add or subtract?
subtract
Decompose the number 452.
400 + 50 + 2
Morgan got 64 pieces of Halloween candy trick-or-treating. Wyatt got 135 pieces of Halloween candy. How many pieces of candy did they get trick-or-treating in all?
60 + 4
100 + 30 + 5
______________
100 + 90 + 9 = 199
Ellierose has 172 stuffed animals at home. Izayah has 85 stuffed animals at home. How many stuffed animals do they have in all?
172 + 85 = 257
There are 91 students in 3rd grade at Powder Mill. There are 124 students in 4th grade. How many students are in 3rd and 4th grade combined?
91 + 124 = 215
Does the key word "difference" mean you need to add or subtract?
subtract
Decompose the number 999.
900 + 90 + 9
Ms. Massoia bought 255 pieces of candy to hand out for Halloween. She gave away 134 pieces of candy so far. How many pieces of candy does she have left?
255 - 134 = 121
Mrs. Desmarais and her family went apple picking. Together they picked 276 apples. They ate 156 of them so far. How many apples does Mrs. Desmarais and her family have left?
276 - 156 = 120
Ms. Aliengena has a tomato garden every year. This year she grew 342 tomatoes. Last year she grew 120 tomatoes. How many more tomatoes did she grow in her garden this year?
342-120 = 222
What does capacity mean?
The amount of liquid a container can hold.
Decompose the number 1,378.
1,000 + 300 + 70 + 8
Johnathan plays with the jump rope every day at recess. He jumped with the jump rope 453 times on Monday and 371 times on Tuesday. How many jumps did he do on Monday and Tuesday combined?
453 + 371 = 824
Rory and Clayton play baseball every weekend. Last weekend they threw the ball back and forth 534 times. This weekend they threw the ball back and forth 419 times. How many times did they trow the ball back and forth both weekends?
534 + 419 = 953
Gracie and Morgan love to read! Over the weekend Gracie read for 364 minutes and Morgan read for 476 minutes. How many minutes did they read all together?
364 + 476 = 840
How many grams are in 1 kilogram?
1,000 g = 1 kg