Write the steps for how to use a number line to multiply a 2 digit number by 20. give an example
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On the number line you would start with 2 and end at 20 so your space would be 10 and your number sentence is 2×10=20
Can someone please help me!? WILL MARK BRAINLIEST :)
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Answer:
Which question?
Step-by-step explanation:
There is no question
Simplify (-2xy2)4(2x3y4)2
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What is the value of x when 10(x + 2) = 5(x + 8)
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the answer is x=4. you have to use the distributive property on both sides then begin solving for x.
Use the distributive property to get 10x+20=5x+40. Subtract 5x from both sides to get 5x+20=40. Subtract 20 from both sides to get 5x=20. Divide 5 from both sides to get x=4.
x=4
What is 428.6401 rounded to the nearest whole number ?
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it would be 429 because 5 or more go next door for or less home is best. and 8 is greater then 5
Since you're rounding to the nearest whole number, you use the tenths place to determine how to round it. 6 ≥ 5 so the ones place is rounded up, making 429 your answer.
What is the best estimate for the product of 289 and 7
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I would estimate it as (300 x 7) = 2100
Then I would subtract (11 x 7) + 77 from that to get the exact answer of 2023
~~~~~~~~~~ I didn't use a calculator or paper. The 'trick' is to notice that 289 = (300 - 11)
I was taught to round it up to the nearest ten, then multiply it like this, 289, rounded up is 290, then seperate the number, (200 + 90)
200 X 7 = 1400 (multiply the numeral, then add the zeros) 90 X 7 = 630 (repeat the same process)