几道简算题5
1.53.5×35.3+53.5×43.2+78.5×46.52.235×12.1++235×42.2-135×54.33.3.75×735-3/8×5730+16.2×...
1.53.5×35.3+53.5×43.2+78.5×46.5
2.235×12.1++235×42.2-135×54.3
3.3.75×735-3/8×5730+16.2×62.5 展开
2.235×12.1++235×42.2-135×54.3
3.3.75×735-3/8×5730+16.2×62.5 展开
3个回答
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53.5×35.3+53.5×43.2+78.5×46.5
=53.5×(35.3+43.2)+78.5×46.5
=53.5×78.5+78.5×46.5
=(53.5+46.5)×78.54
=100×78.54=7850
235×12.1++235×42.2-135×54.3
=235×(12.1+42.2)-135×54.3
=235×54.3-135×54.3
=100×54.3
=5430
3.75×735-3/8×5730+16.2×62.5
=0.375×7350-0.375×5730+16.2×62.5
=0.375×1620+16.2×62.5
=37.5×16.2+16.2×62.5
=16.2×100
=1620
=53.5×(35.3+43.2)+78.5×46.5
=53.5×78.5+78.5×46.5
=(53.5+46.5)×78.54
=100×78.54=7850
235×12.1++235×42.2-135×54.3
=235×(12.1+42.2)-135×54.3
=235×54.3-135×54.3
=100×54.3
=5430
3.75×735-3/8×5730+16.2×62.5
=0.375×7350-0.375×5730+16.2×62.5
=0.375×1620+16.2×62.5
=37.5×16.2+16.2×62.5
=16.2×100
=1620
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