Products
Find the product.
26 x 7
182
Write the expression in words and calculate the value.
5 x (13 + 4)
5 times the sum of 13 and 4 = 85
Without calculating the values, compare the expressions using <, >, or =. Explain (raise hand).
(8 + 17) x 19 ◯ 91 x (17 + 8)
(an example of an acceptable answer)
(8 + 17) x 19 is less than 91 x (17 + 8) because while the sum of 8 and 17/the sum of 17 and 8 are the same 19 is a much smaller number than 91. Multiplying 25 by 19 will get you a much smaller number than multiplying 25 by 91.
Find the product.
273 x 701
191,373
Write the estimation equation for the expression and calculate the value:
5.4 x 22 ≈
5 x 20 = 100
Find the product.
26 x 70
1820
Write the expression in words and calculate the value.
23 x (12 + 5)
23 times the sum of 12 and 5. The value is 391.
Without calculating the values, compare the expressions using <, >, or =. Explain (raise hand).
The sum of 4 sixes and 3 sixes ◯ the difference between 14 sixes and and 7 sixes.
(an example answer)
I know that they are equal because the sum of 4 sixes and 3 sixes is 7 sixes. The difference between 14 sixes and 7 sixes is also 7 sixes. 7 sixes and 7 sixes are equal/the same.
Find the product.
307 x 485
148,895
Write the estimation equation for the expression and calculate the value:
6.2 x 46 ≈
6 x 50 = 300
Find the product.
260 x 70
18,200
Write the expression in words and calculate the value.
(84 - 52) x 17
The difference between 84 and 52 times 17. The value is 544.
Without calculating the values, compare the expressions using <, >, or =. Explain (raise hand).
14 x (12 - 1) ◯ (12 - 3) x 14
(example)
I know that 14 x (12 - 1) is greater than (12 - 3) x 14 because 14 x 11 will be a larger value than 14 x 9.
Find the product.
286 x 609
174,174
Write the estimation equation for the expression and calculate the value:
16.5 x 73 ≈
17 x 70 = 1,190
Find the product.
260 x 700
182,000
Write the expression in words and calculate the value.
(14 x 4) + (13 x 4)
The sum of 14 fours and 13 fours
Without calculating the values, compare the expressions using <, >, or =. Explain (raise hand).
The difference between 18 sevens and 3 sevens ◯ the sum of 13 sixes and 2 sixes.
(example)
I know that the difference between 18 sevens and 3 sevens is going to be greater than the sum of 13 sixes and 2 sixes because 15 x 7 is going to have a greater value than 15 x 6.
Find the product.
704 x 578
406,912
Write the estimation equation for the expression and calculate the value:
142.3 x 62 ≈
140 x 60 = 8400
(or)
142 x 60 = 8,520
Find the product.
201 x 70
14,070
Write the expression in words and calculate the value.
(9 x 6) - (7 x 4)
The difference between 9 sixes and 7 fours.
DOUBLE JEOPARDY!!!!!
Without calculating the values, compare the expressions using <, >, or =. Explain (raise hand).
(28 x 12) + (22 x 12) ◯ (13 x 24) + (12 x 24)
(example)
These two values are equal because 50 twelves and 25 twenty-fours are the same value. 24 is twice the size of 12 which means you will need half the amount of 24's to get to the same value.
Find the product.
937 x 826
773,962
Write the estimation equation for the expression and calculate the value:
1247 x 107 ≈
1000 x 100 = 100,000
1200 x 100 = 120,000
1250 x 100 = 125,000