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3.25+2.9-1.25简算

3.25=0.25*13,2.5=0.25*10.3.25÷2.5=13÷10=1.3

1.25+2.25+3.25+4.25+30.25=(1+2+3+4)+0.25*4+30.25=10+1+30.25=11+30.25=41.25

3.25+1.98=3.25-0.02+0.02+1.98=3.23+2=5.2310.32-1.98=10.32+0.02-0.02-1.98=10.34-2=8.34

[3.25*(4.7-3.5)]/1.25=3.25x(4.7-3.5)/1.25=3.25x1.2/1.25=3.25x(1+0.2)/1.25=(3.25+0.65)/1.25=3.9/1.25=39/10/(5/4)=39/10x4/5=78/25=3.12

原式=3.25÷(0.8*1.25)=3.25÷1=3.25

3.25+1.25x0.18 =3.25+1.25x(0.08x0.1)=3.25+1.25x0.08+1.25x0.1=3.25+0.1+0.125= 3.475

3.25-(1.25-0.6)=3.25-1.25+0.6=2+0.6=2.6

3.25+1.98+10.32-1.98=(3.25+10.32)+(1.98-1.98)=13.57+0=13.57 希望能帮到你!

①25*1.25*32,=25*1.25*4*8,=(25*4)*(1.25*8),=100*10,=1000;②(3.75-2.9+2.25)÷31%,=(3.75+2.25-2.9)÷31%,=(6-2.9)÷0.31,=3.1÷0.31,=10.

2.9*25+2.9*15=2.9x(25+15)=2.9x40=116 请采纳!!

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