Question

Решите примеры с решением 2 целых 3/10 • 1,1. ; 71/100•6,3 ; 3/5: 0,25+0,6; 1,6•1/2+3,2

Answer 1

1) 23/10 * 11/10 =2,53
2)71/100*6,3=0,71 * 6,3 = 4,473
3)3/5: 0,25+ 0,6= 0,6 * 4 +0,6 = 3
4)1,6*1/2 + 3,2 = 0,8 + 3,2 = 4

Answer 2

$2 \frac{3}{10} \times 1.1 = \frac{23}{10} \times 1 \frac{1}{10} = \frac{23}{10} \times \frac{11}{10} = \frac{253}{100} = 2 \frac{53}{100} = 2.53$

$\frac{71}{100} \times 6.3 = \frac{71}{100} \times 6 \frac{3}{10} = \frac{71}{100} \times \frac{63}{10} = \frac{71 \times 63}{100 \times 10} = \frac{4473}{1000} = 4 \frac{473}{1000} = 4.473$

$\frac{3}{5} \div 0.25 + 0.6 = 3 \\ \\ 1) \frac{3}{5} \div \frac{25}{100} = \frac{3}{5} \times \frac{100}{25} = \frac{3 \times 100}{5 \times 25} = \frac{3 \times 20}{1 \times 25} = \frac{60}{25} = 2.4 \\ \\ 2.4 + 0.6 = 3$

$1.6 \times \frac{1}{2} + 3.2 = 4 \\ 1)1.6 \times \frac{1}{2} = 1 \frac{6}{10} \times \frac{1}{2} = \frac{16}{10} \times \frac{1}{2} = \frac{16 \times 1}{10 \times 2} = \frac{8}{10} = 0.8 \\ \\ 2)0.8 + 3.2 = 4$