Вычислите: 1)2 4/5:0,7-1,8 2)6:3/4+1,2 3)3/5:0,25+0,6 4)1,6*1/2+3,2 5)0,3*1 4/5-0,24 6)0,8*1 1/4+5,6. Created by Danik558. matematika-ru

4+5,6...

Danik558 @Danik558

November 2021 1 16 Report

Вычислите: 1)2 4/5:0,7-1,8 2)6:3/4+1,2 3)3/5:0,25+0,6 4)1,6*1/2+3,2 5)0,3*1 4/5-0,24 6)0,8*1 1/4+5,6

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piksaeva85znayka

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2 4/5÷0,7-1,8=2,2
1)2 4/5÷0,7=14/5÷7/10=14/5×10/7=2×2=4
2)4-1,8=2,2

6÷3/4+1,2=9,2
1)6÷3/4=6×4/3=2×4=8
2)8+1,2=9,2

3/5÷0,25+0,6=3
1)3/5÷0,25=3/5÷25/100=3/5÷1/4=3/5×4=12/5=2 2/5=2 4/10=2,4
2)2,4+0,6=3

1,6×1/2+3,2=4
1)1,6×1/2=16/10×1/2=8/5×1/2=4/5×1=4/5=8/10=0,8
2)0,8+3,2=4

0,3×1 4/5-0,24=0,8
1)0,3×1 4/5=3/10×9/5=27/50=54/100=0,54
2)0,54+0,24=0,8

0,8×1 1/4+5,6=6,6
1)0,8×1 1/4=8/10×5/4=4/5×5/4=1
2)1+5,6=6,6

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