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脱式计算.(能简算的要简算)(1)1.08×0.8÷0.27...

(1)1.08×0.8÷0.27=1.08÷0.27×0.8,=4×0.8,=3.2;(2)102×0.45=(100+2)×0.45,=100×0.45+2×0.45,=45+0.9,=45.9;(3)22.78÷1.25÷0.8=22.78÷(1.25×0.8),=22.78÷1,=22.78;(4)0.34×101-0.34=(101-1)×0.34,=100×0.34,=34.

原式 =(1.08÷0.27)x0.8 =4x0.8 =3.2

见图

(1)1020+270÷18-864,=1020+15-864,=171;(2)23÷0.8×34,=23÷45×34,=23×54×34,=58;(3)18+57+6.875+27,=(18+6.875)+(57+27),=(0.125+6.875)+1,=7+1,=8;(4)0.25×64×125%,=0.25×4×2×8×1.25,=(0.25×4)×(8×1.25)×2,=1×...

1.08x0.8÷0.27 =0.864÷0.27 =3.2

(1)5.4×(86.5-16.25÷0.5),=5.4×(86.5-32.5),=5.4×54,=291.6;(2)3-32×1021-27,=3-57-27,=3-(57+27),=3-1,=2;(3)95.6×18+4.4×18,=(95.6+4.4)×18,=100×18,=1800;(4)1516+(716-14)÷12,=1516+316÷12,=1516+616,=21...

(1)762-408÷4×5,=762-102×5,=762-510,=252;(2)35×27+57×14,=10+10,=20;(3)1.5×[0.02÷(2.1-2.09)],=1.5×[0.02÷0.01],=1.5×2,=3;(4)12.5×8.8,=12.5×(8+0.8),=12.5×8+12.5×0.8,=100+10,=110;(5)87.58-(7.58+3.8),...

2.7×1.2 27×0.23 0.27×33的脱式计算简便 =2.7x(1.2+10x0.23+0.1x33) =2.7x(1.2+2.3+3.3) =2.7x6.8 =18.36

(1)0.233-(0.133-57)+27,=0.233-0.133+57+27,=(0.233-0.133)+(57+27),=0.1+1,=1.1;(2)4.62+9.9+5.38+0.1,=(4.62+5.38)+(0.1+9.9),=10+10,=20;(3)4×0.6+0.6÷14,=4×0.6+0.6×4,=0.6×(4+4),=0.6×8,=4.8;(4)0.38×7...

(1)0.27+0.27×0.37+0.27×0.63=0.27×(1+0.37+0.63)=0.27×2=0.54(2)12.5×4×2.5×16=(12.5×8×2)×(4×2.5)=200×10=2000(3)9.68×101=9.68×(100+1)=9.68×100+9.68=968+9.68=977.68 (4)9.6÷(9.6×4)=9.6÷9.6÷4=1÷4=0.25(5)0.78÷0.25÷4...

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