This week we’ve been practicing our multiplication and learning to use the distributive property when multiplying larger numbers. Here’s an example to remind you and help you explain things to your family.
127 x 4 =
Can be broken down into: (100 x 4) + (20 x 4) + (7 x 4) so it is 400 + 80 + 28 or 508. Now I can add the answer to the original equation. Here are some for you to do. Leave your work in a comment if you’d like.
Kayla was getting ready for the trick-or-treaters to come to her house. She had 5 bags of candy. Each bag had 134 pieces of candy in it. She dumped the candy into a big bowl for sharing. How many pieces of candy did Kayla have for the trick-or-treaters?
Abi decorated her house for Halloween. She had three packages of decorations. There were 216 decorations like bats, witches, spiders, hats and pumpkins in each package. How many decorations did Abi have altogether?
Ivan, his brother and two sisters carved their Halloween pumpkins. They saved and roasted the seeds. There were 72 seeds in each pumpkin. How many seeds did Ivan and his family roast altogether?
Kayla’s Candy
5×134=670 candies
How I solved it:
100×5=500
30×5=150
4×5=20
500+150+20=670
Ivan’s Pumpkin Seeds
4×72=288
70×4=280
4×2=8
280+8=288 roasted pumpkin seeds
Problems figured out by Elias and typed by Anna.
That’s some great math thinking! So glad you found the problems and were able to solve them with efficient math thinking.
Kayla has…
134×5=
100×5=500
30×5=150
4×5=20
500+150+20= 670 pieces of candy
Abi has…
3×216
200×3=600
3×10=30
3×6=18
600+30+18= 648 Decorations
That’s some fantastic math thinking Abi! Well solved!
134 x 5 = 670
100 x 5 = 500
30 x 5 =150
4 x 5 = 20
500 + 150 + 20 = 670
216 x 3 = 648
200 x 3 =600
10 x 3 =30
6 x 3 = 18
600 + 30+ 18 = 648
72 x 4 =288
70 x 4 = 280
2 x 4 = 8
280 + 8 = 288