
怎样简便怎样算.55×25+25×4577×13-13×27142+586+358+11444×25104×3255-36÷3+1
怎样简便怎样算.55×25+25×4577×13-13×27142+586+358+11444×25104×3255-36÷3+15...
怎样简便怎样算.55×25+25×4577×13-13×27142+586+358+11444×25104×3255-36÷3+15
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(1)55×25+25×45
=(55+45)×25
=100×25
=2500;
(2)77×13-13×27
=(77-27)×13
=50×13
=650;
(3)142+586+358+114
=142+358+(586+114)
=500+700
=1200;
(4)44×25
=(40+4)×25
=40×25+4×25
=1000+100
=1100;
(5)104×32
=(100+4)×32
=100×32+4×32
=3200+128
=3328;
(6)55-36÷3+15
=55+15-36÷3
=70-12
=58.
=(55+45)×25
=100×25
=2500;
(2)77×13-13×27
=(77-27)×13
=50×13
=650;
(3)142+586+358+114
=142+358+(586+114)
=500+700
=1200;
(4)44×25
=(40+4)×25
=40×25+4×25
=1000+100
=1100;
(5)104×32
=(100+4)×32
=100×32+4×32
=3200+128
=3328;
(6)55-36÷3+15
=55+15-36÷3
=70-12
=58.
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