用简便方法计算332×6+68×6 79×101 &nbs...
用简便方法计算332×6+68×679×10119×4×2599.6-5.22-4.785.25-(0.86+0.25)6.31+4.6+0.69+3.4....
用简便方法计算332×6+68×6 79×101 19×4×25 99.6-5.22-4.78 5.25-(0.86+0.25) 6.31+4.6+0.69+3.4.
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①332×6+68×6
=(332+68)×6
=400×6
=2400;
②79×101
=79×100+79
=7900+79
=7979;
③19×4×25
=19×(4×25)
=19×100
=1900;
④99.6-5.22-4.78
=99.6-(5.22+4.78)
=99.6-10
=89.6;
⑤5.25-(0.86+0.25)
=5.25-0.25-0.86
=5-0.86
=4.14;
⑥6.31+4.6+0.69+3.4
=(6.31+0.69)+(4.6+3.4)
=7+8
=15.
=(332+68)×6
=400×6
=2400;
②79×101
=79×100+79
=7900+79
=7979;
③19×4×25
=19×(4×25)
=19×100
=1900;
④99.6-5.22-4.78
=99.6-(5.22+4.78)
=99.6-10
=89.6;
⑤5.25-(0.86+0.25)
=5.25-0.25-0.86
=5-0.86
=4.14;
⑥6.31+4.6+0.69+3.4
=(6.31+0.69)+(4.6+3.4)
=7+8
=15.
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