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Comprehensive Review: Mental Math with Whole Numbers, Decimals, and Scientific Notation

This review covers essential mental math skills, including multiplying and dividing whole numbers and decimals, as well as converting numbers to scientific notation. It includes a variety of practice problems with answers, helping learners sharpen their math abilities. Students will work through calculations that require mental strategies, missing number identification, and standard form representation. Ideal for improving speed and accuracy in mathematical problem-solving.

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Comprehensive Review: Mental Math with Whole Numbers, Decimals, and Scientific Notation

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

  2. Write in standard form: 1) 2.35 x 108=2) 7.02 x 1015 =3) 4.0001 x 109 =

  3. Answer: 1) 120,000 2) 900 3) 300,000 4) 200 5) 54,000 6) 60 7) 7700 8) 900 9) 150,000 10) 20 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 =

  4. Answers: 1) 1000 2) 100 3) 34.2 4) .74 Write the missing number.1) 23.3 ÷ ________ = .0233 2) 5.4 × ______ = 540 3) _________ ÷ 100 = .3424) ________ × 1000 = 740

  5. Answers: 1) 5,628 2) .36 3) 390 4) .23 5) 12.3 6) .089 Multiply or divide mentally.1) 56.28 x100 = 2) 3.6 ÷10 =3) .39 x1000 = 4) 23 ÷ 100 = 5) .123 x100 = 6) 89 ÷ 1000 =

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

  7. Answers: 1) .00336 2) 874.038 3) .38868 4) .003225 Multiply:1) 1.68 x .002 =2) 418.2 x 2.09 =3) .474 x .82 =4) 2.15 x .0015 =

  8. Answers: 1) 1.2 x 1010 2) 6.04 x 108 3) 2.3009 x 1012 Write in scientific notation:1) 12,000,000,0002) 604,000,0003) 2,300,900,000,000

  9. Answers: 1) 80 2) 50 3) 20 4) 300 Give the base: 1) ___2 = 6400 2) ___3 = 125,000 3) ___4 = 160,000 4) ____ 3 = 27,000,000

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

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