简便计算.(1)94×27+73×94 (2)25×26×4(3)128×25-28×25 (4)...
简便计算.(1)94×27+73×94(2)25×26×4(3)128×25-28×25(4)(5×196)×2(5)98×45(6)88×101....
简便计算.(1)94×27+73×94 (2)25×26×4(3)128×25-28×25 (4)(5×196)×2(5)98×45 (6)88×101.
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(1)94×27+73×94
=94×(27+73)
=94×100
=9400;
(2)25×26×4
=(25×4)×26
=100×26
=2600;
(3)128×25-28×25
=(128-28)×25
=100×25
=2500;
(4)(5×196)×2
=(5×2)×196
=10×196
=1960;
(5)98×45
=100×45-2×45
=4500-90
=4410;
(6)88×101
=68×100+68×1
=6800+68
=6868.
=94×(27+73)
=94×100
=9400;
(2)25×26×4
=(25×4)×26
=100×26
=2600;
(3)128×25-28×25
=(128-28)×25
=100×25
=2500;
(4)(5×196)×2
=(5×2)×196
=10×196
=1960;
(5)98×45
=100×45-2×45
=4500-90
=4410;
(6)88×101
=68×100+68×1
=6800+68
=6868.
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