Worksheet 9 (G.7)

Type your name, student number and class below: Multiple-ChoiceClick the letter of the correct answer.1) What is n in: n + (8 + 12) = 24 ? 5 4 6 3 2) What is the value of d in : d × 10 = 0 ? -1 1 2 0 3) Find the value of the variable in: (10 × 4) + (10 × 9) = y(4 + 9) 10 11 9 4 4) Find the value of the variable: 9 + 25 = 25 + b + 4 -3 -4 5 -5 5) Find the value of the variable: 79 × 16 = (m + 79) × 16 . 1 0 2 -2 6) Find the value of the variable: (20 - 5 + 9) × 7 = (20 × 7) + (m × 7) + (9 × 7) . 20 9 0 -5 7) Paul has 10 marbles and Saffire has 5. If we double their marbles, how many marbles do they have now? Which of the following can illustrate the problem? 2(10 + 5) = (2 x 10) + (2 x 5) 2(10 - 5) = (2 x 10) - (2 x 5) 3(10 + 5) = (3 x 10) + (3 x 10) 10(2 + 5) = (10 x 2) + (10 x 5) 8) From question number 7, how many marbles do Paul and Saffire have? 35 25 30 45 9) Write the following in expanded form: 0.789 . (7 x 1 + (8 x 1 + (9 x 1 (7 x 10) + (8 x 100) + (9 x 1000) (-7 x 10) + (-8 x 100) + (-9 x 1000) (7 x 1 - (8 x 1 - (9 x 1 10) Write the following in expanded form: 45.89 . (4 x 100) + (5 x 10) + (8 x 1 + (9 x 1 (4 x 100) + (5 x 10) + (8 x 1 + (9 x 1 (4 x 10) + (5 x 1) + (8 x 1 + (9 x 1 (-4 x 100) + (-5 x 10) + (-8 x 1 + (-9 x 1 11) Expand the following: 456.123. (4 x 10) + (5 x 20) + (6 x 30) + (1 x 1 + (2 x 1 + (3x 1 (4 x 100) + (5 x 10) + (6 x 1) + (1 x 1 + (2 x 1 + (3 x 1 (4 x 1000) + (5 x 100) + (6 x 10) + (1 x 1 + (2 x 100) + (3 x 1000) (4 x 10) + (5 x 100) + (6 x 1 + (1 x 1 + (2 x 1 12) What is m in: (15 - 6 + 8) × 4 = (15 × 4) + (m × 4) + (8 × 4) ? -6 -15 -7 4 Click the blank and choose from the options. 1) Round off 19.4685 to the nearest thousandths: 19.4692) Round off 19.4685 to the nearest whole number: 193) Round off 19.4685 to the nearest tenths:19.54) Round off 345.7891 to the nearest tenths: 345.85) Round off 345.7891 to the nearest hundredths: 345.796) Round off 7.56428 to the nearest thousandths. 7.5647) Round off 7.56428 to the nearest tenths. 7.68) Round off 7.56428 to the nearest hundredths. 7.569) Round off 7.56428 to the nearest whole number. 810) Round off 0.00783 to the nearest hundredths. 0.01