The arrow points to the smaller of the two numbers Year 7 mathematics: Decimals 29-May-18 Decimals 0.4 0.04 0.80 0.8 0.17 0.6 0.801 0.9 0.50 0.056 0.900 0.300 0.42 0.042 0.7 0.620 0.002 0.2 0.64 Place one of the following symbols, <, =, > to make each statement true The arrow points to the smaller of the two numbers

Multiplying and dividing by powers of 10 Year 7 mathematics: Decimals 29-May-18 Multiplying and dividing by powers of 10 The powers of 10 are numbers such as 10, 100, 1000 etc. When multiplying move the decimal point to the right. When dividing move the decimal point to the left. You move the decimal point by the number of zeros. Place zeros on the end or beginning when needed. a) 31415 9265 x 100 = 3141592 65 B) 31415 9265 x 1000 = 31415926 5 C) 31415 9265 ÷ 100 = 314 159265 D) 31415 9265 ÷ 10 = 3141 59265

Multiplying and dividing by powers of 10 Year 7 mathematics: Decimals 29-May-18 Multiplying and dividing by powers of 10 The powers of 10 are numbers such as 10, 100, 1000 etc. When multiplying move the decimal point to the right. When dividing move the decimal point to the left. You move the decimal point by the number of zeros. Place zeros on the end or beginning when needed. a) 815 92 x 100 = 81592 B) 815 92 x 1000 = 81592 C) 0 02 ÷ 100 = 0 0002 D) 0 02 X 1000 = 20

Example 1 Evaluate the following. Year 7 mathematics: Decimals 29-May-18 Example 1 Evaluate the following. a) 3·78 × 10 b) 9·2 × 100 c) 0·62 × 1000 d) 4·305 × 10000 a) 3·78 × 10 = 37·8 b) 9·2 × 100 = 920 c) 0·62 × 1000 = 620 d) 4·305 × 10000 = 43 050 Evaluate the following. e) 6·42 ÷ 10 f) 5·7 ÷ 100 g) 0·06 ÷ 1000 h) 12·07 ÷ 10000 e) 6·42 ÷ 10 = 0·642 f) 5·7 ÷ 100 = 0·057 g) 0·06 ÷ 1000 = 0·000 06 h) 12·07 ÷ 10000 = 0·001 207

Today’s work Ex 7-06 Page 229 All Qs 1st column only Yesterday’s work Year 7 mathematics: Decimals 29-May-18 Today’s work Ex 7-06 Page 229 All Qs 1st column only Yesterday’s work Ex 7-05 All Qs a, c, e…