Quarter 1 Test 3 Review X. Mental Math: Multiplying & Dividing with Whole Numbers with Whole Numbers XI. Mental Math: Multiplying & Dividing with Decimals with Decimals XII. Scientific Notation XIII. Multiplication of Whole Numbers and Decimals

Answers: 1) 235,000,000 2) 7,020,000,000,000,000 3) 4,000,100,000 Write in standard form: 1) 2.35 x 10 8 = 2) 7.02 x = 3) x 10 9 =

Multiply or divide mentally. 1) 300 x 400 = 2) 72,000 ÷ 80 = 3) 50 x 6,000 = 4) 120,000 ÷ 600 = 5) 60 x 900 = 6) 540,000 ÷ 9,000 = 7) 110 x 70 = 8) 36,000 ÷ 40 = 9) 300 x 500 = 10) 3000 ÷ 150 = Answer: 1) 120,000 2) 900 3) 300,000 4) 200 3) 300,000 4) 200 5) 54,000 6) 60 5) 54,000 6) 60 7) ) 900 7) ) 900 9) 150,000 10) 20 9) 150,000 10) 20

Write the missing number. 1) 23.3 ÷ ________ = ) 5.4 × ______ = 540 3) _________ ÷ 100 =.342 4) ________ × 1000 = 740 Answers: 1) ) 100 3) ).74

Multiply or divide mentally. 1) x100 = 2) 3.6 ÷10 = 3).39 x1000 = 4) 23 ÷ 100 = 5).123 x100 = 6) 89 ÷ 1000 = Answers: 1) 5,628 2).36 3) 390 4).23 5) ).089

Multiply: 1) 538 x 72 = 2) 6,865 x 146 = 3) 3,429 x 279 = Answers: 1) 38,736 2) 1,002,290 2) 1,002,290 3) 956,691 3) 956,691

Answers: 1) ) ) ) ) Multiply: 1) 1.68 x.002 = 2) x 2.09 = 3).474 x.82 = 4) 2.15 x.0015 =

Answers: 1) 1.2 x ) 6.04 x ) 6.04 x ) x ) x Write in scientific notation: 1) 12,000,000,000 2) 604,000,000 3) 2,300,900,000,000

Give the base: 1) ___ 2 = ) ___ 3 = 125,000 3) ___ 4 = 160,000 4) ____ 3 = 27,000,000 Answers: 1) 80 2) 50 3) 20 4) 300

Multiply: 1) 593 x 406 = 2) 327 x 250 = 3) 807 x 540 = Answers: 1) 240,758 2) 81,750 3) 435,780