题目内容
| 下面各题怎样简便就怎样算. 246+98= | 15×4×25×6= |
| 95×102= | 265+158+42+35= |
| 250×28= | 126×8+74×8= |
(1)246+98
=246+100-2
=346-2
=344;
(2)15×4×25×6
=(15×6)×(4×25)
=90×100
=9000;
(3)95×102
=95×(100+2)
=95×100+95×2
=9500+190
=9690;
(4)265+158+42+35
=(265+35)+(158+42)
=300+200
=500;
(5)250×28
=250×(4×7)
=(250×4)×7
=1000×7
=7000;
(6)126×8+74×8
=(126+74)×8
=200×8
=1600.
=246+100-2
=346-2
=344;
(2)15×4×25×6
=(15×6)×(4×25)
=90×100
=9000;
(3)95×102
=95×(100+2)
=95×100+95×2
=9500+190
=9690;
(4)265+158+42+35
=(265+35)+(158+42)
=300+200
=500;
(5)250×28
=250×(4×7)
=(250×4)×7
=1000×7
=7000;
(6)126×8+74×8
=(126+74)×8
=200×8
=1600.
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