Multiply with Zeroes
8x4=
32
The average adult has 32 teeth. It takes the dental hygentist about 1 hour to clean 1 set of teeth. How many teeth will the hygentist clean in 9 hours?
Estimate your answer.
30x10 = 300 teeth
23 x 59 =
1357
Slide 1
24 sq. cm
Lauren and Gina's mother told her daughters they can swim in the pool for 20 minutes. First, they swam laps in the pool for 7 minutes. Then they swam underwater for one minute. Then they played water polo for 8 minutes. How much longer can they stay in the pool?
4 minutes
5x30=
150
Hannah bought 22 bags of apples. Each bag had 16 apples in it. About how many apples did Hannah buy?
Estimate your answer.
20 x 20 = 400 apples
99 x 43 =
4,257
Slide 2
15 sq cm
Matthew and his brother Shawn played swimming-pool-basketball. Each basket was worth 3 points. Matthew scored 9 points. Shawn scored 6 points. What is the total number of baskets made during this game?
5 baskets
50x40=
2,000
Tony has 3 cases full of toy cars. Each case holds about 45 cars. About how many cars does Tony have?
Estimate your answer.
3 x 50 = 150 cars
36 x 28 =
1008
Slide 3
111 sq m
Jennie makes quilts. She can make 7 quilts with 21 yards of material. How many yards of material would be required to make 12 quilts?
36 yards
700x80=
56,000
Suzy is helping with the school bake sale. She needs to bake 250 cookies. She baked 32 sheets of cookies. Each sheet can fit 12 cookies. How many cookies did Suzy bake? And was it enough for the bake sale?
Estimate your answer.
30 x 10 = 300 cookies
Yes it was enough cookies.
65 x 17 =
1105
Slide 4
99 sq m
Brayden and Gavin were playing touch football against Cole and Freddy. Touchdowns were worth 7 points. Brayden and Gavin scored 7 touchdowns. Cole and Freddy's team scored 9 touchdowns. How many more points did Cole and Freddy have than Brayden and Gavin?
14 points
5000x600=
3,000,000
Tom mows lawns for a summer job. He can mow one lawn in about 45 minutes. On Monday, he mowed 2 lawns, Tuesday he mowed 3 lawns, and Wednesday he mowed 4 lawns. About how many minutes did Tom spend mowing lawns?
Estimate your answer.
3 + 2 + 4 = 9 ~ 10 lawns
50 x 10 = 500 minutes
79 x 96=
7584
Slide 5
14 sq cm
On Thursday the Meat King Market sold 210 pounds of ground beef. On Friday they sold twice that amount. On Saturday they only sold 130 pounds. How much more meat did they sell on Friday than Saturday?
290 pounds of meat