Q.1.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 5: first divide by 2, then move the digits to the left. Note: whole numbers that do not have decimal parts are written without a d.p. e.g. 200.0 = 200: in such cases the d.p. is not normally needed. 3,434 × 5 = ?
Q.2.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 9: first multiply the number by 10, then subtract the original number from it. 47 × 9 = ?
Q.3.
Using the tip, what is the correct answer to the given calculation? TIP: To divide a number by 25: divide by 100, then multiply by 225 ÷ 25 = ?
Q.4.
Using the tip, what is the correct answer to the given calculation? TIP: To divide a number by another number which is a multiple of 10 and whose only non zero digit is the leading digit 1: move the digits to the right by the same number of zeros that are in the multiple ofNote: whole numbers that do not have decimal parts are written without a d.p. e.g. 200.0 = 200: in such cases the d.p. is not normally needed. 76,345 ÷ 1,000 = ?
Q.5.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 8: multiply the number by 2, then by 2 again, and finally by 120 × 8 = ?
Q.6.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 12, first multiply the number by 10, then add twice the original number to it. 38 × 12 = ?
Q.7.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 25: multiply by 100, then divide by 816 × 25 = ?
Q.8.
Using the tip, what is the correct answer to the given calculation? TIP: To divide a number by 5: first multiply by 2 and then move the digits to the right. 888 ÷ 5 = ?
Q.9.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by 11, first multiply the number by 10, then add the original number to it. 96 × 11 = ?
Q.10.
Using the tip, what is the correct answer to the given calculation? TIP: To multiply a number by another number which is a multiple of 10 and whose only non zero digit is the leading digit 1: move the digits to the left by the same number of zeros that are in the multiple ofNote: whole numbers that do not have decimal parts are written without a d.p. e.g. 200.0 = 200: in such cases the d.p. is not normally needed. 34.56 × 100 = ?