tính giá trị của biểu thức: a,4,25×57,43-325+42,57×4,25 b,12/50+8%+59/100+9% c,4,14:3,17+5,37:3,17-3 28/08/2021 Bởi Claire tính giá trị của biểu thức: a,4,25×57,43-325+42,57×4,25 b,12/50+8%+59/100+9% c,4,14:3,17+5,37:3,17-3
Đáp án: a) `4,25×57,43-325+42,57×4,25` `= 4,25×(57,43+42,57)-325` `= 4,25×100-325` `= 425-325` `= 100` b) `12/50+8%+59/100+9%` `= 6/25+2/25+59/100+9/100` `= 8/25+17/25` `= 1` c) `4,14÷3,17+5,37÷3,17-3` `= (4,14+5,37)÷3,17-3` `= 9,51÷3,17-3` `= 3-3` `= 0` Bình luận
Đáp án: a, 4,25 × 57,43 – 325 + 42,57 × 4,25 = 4,25 × 57,43 + 42,57 × 4,25 – 325 = 4,25 × (57,43 + 42,57) – 325 = 4,25 × 100 – 325 = 425 – 325 = 100 b,`\frac{12}{50}` + 8% + `\frac{59}{100}`+ 9% = `\frac{24}{100}` + 8% + `\frac{59}{100}`+ 9% = 24% + 8% + 59% + 9% = 100 % c, 4,14 : 3,17 + 5,37 : 3,17 – 3 = ( 4,14 + 5,37) : 3,17 – 3 = 9,51 : 3,17 – 3 = 3 – 3 = 0 Bình luận
Đáp án:
a) `4,25×57,43-325+42,57×4,25`
`= 4,25×(57,43+42,57)-325`
`= 4,25×100-325`
`= 425-325`
`= 100`
b) `12/50+8%+59/100+9%`
`= 6/25+2/25+59/100+9/100`
`= 8/25+17/25`
`= 1`
c) `4,14÷3,17+5,37÷3,17-3`
`= (4,14+5,37)÷3,17-3`
`= 9,51÷3,17-3`
`= 3-3`
`= 0`
Đáp án:
a, 4,25 × 57,43 – 325 + 42,57 × 4,25
= 4,25 × 57,43 + 42,57 × 4,25 – 325
= 4,25 × (57,43 + 42,57) – 325
= 4,25 × 100 – 325
= 425 – 325
= 100
b,`\frac{12}{50}` + 8% + `\frac{59}{100}`+ 9%
= `\frac{24}{100}` + 8% + `\frac{59}{100}`+ 9%
= 24% + 8% + 59% + 9%
= 100 %
c, 4,14 : 3,17 + 5,37 : 3,17 – 3
= ( 4,14 + 5,37) : 3,17 – 3
= 9,51 : 3,17 – 3
= 3 – 3
= 0