计算下面各题,能简算的要简算.125×88 25+25×3998×101125×16×25 72×102-2×72(1...
计算下面各题,能简算的要简算.125×8825+25×3998×101125×16×2572×102-2×72(125+16)×8....
计算下面各题,能简算的要简算.125×88 25+25×3998×101125×16×25 72×102-2×72(125+16)×8.
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(1)125×88
=125×8×11
=1000×11
=11000;
(2)25+25×39
=25×(1+39)
=25×40
=1000;
(3)98×101
=98×(100+1)
=9800+98
=9898;
(4)125×16×25
=(125×8)×(2×11)
=1000×22
=22000;
(5)72×102-2×72
=72×(102-2)
=72×100
=7200;
(6)(125+16)×8
=125×8+16×8
=1000+128
=1128.
=125×8×11
=1000×11
=11000;
(2)25+25×39
=25×(1+39)
=25×40
=1000;
(3)98×101
=98×(100+1)
=9800+98
=9898;
(4)125×16×25
=(125×8)×(2×11)
=1000×22
=22000;
(5)72×102-2×72
=72×(102-2)
=72×100
=7200;
(6)(125+16)×8
=125×8+16×8
=1000+128
=1128.
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