Multiply, Divide, and Order of Operations, On Level Answer Key

Grade 7 rational numbers: multiplying and dividing rational numbers, dividing by decimals, and the order of operations. Tuesday practice at grade level.

Name: Date: Class:

Lesson Notes

Rewrite mixed numbers as improper fractions before you multiply or divide, and decide the sign of the answer before you calculate.

Worked example

$-3.6 \div (-0.04)$: both signs are negative, so the answer is positive.

Move the decimal two places in both numbers: $360 \div 4 = 90$.

Divide by a decimal by shifting the decimal point the same number of places in the divisor and the dividend.
Divide by a fraction by multiplying by its reciprocal.
Parentheses first, then multiply and divide, then add and subtract.

One step per line. The order of operations is easiest to follow when each line shows one operation.

25 problems. Work each one on the canvas under it (pen, eraser and clear are in the canvas toolbar; drag the handle below the canvas for more room). Enter your answer in the box (the keypad under it has fractions, exponents, square roots, pi, the degree sign and the symbols < > ≤ ≥ ≠). When a Unit row is shown, tap the unit for your answer. Then press Check. Write fraction answers as improper fractions in lowest terms. Write decimal answers as decimals. The eye at the right of the row shows or hides the worked solution.