递等式计算(能简便的要简便计算)?
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解题思路:(1)先算除法,再算乘法,最后算减法;
(2)(3)根据乘法分配律简算;
(4)先算小括号里面的除法再算小括号里面的加法,然后算中括号里面的减法,最后算括号外的除法;
(5)先把48分解8×6,再运用乘法结合律简算;
(6)先算除法,再根据加法交换律简算.
(1)5120-6475÷37×24
=5120-175×24
=5120-4200
=920;
(2)25×(40+4)
=25×40+25×4
=1000+100
=1100;
(3)67×96-67+5×67
=67×(96-1+5)
=67×100
=6700;
(4)26400÷[360-(960÷160+154)]
=26400÷[360-(6+154)]
=26400÷[360-160]
=26400÷200
=132;
(5)125×48
=125×(8×6)
=125×8×6
=1000×6
=6000;
(6)815-272÷16+375
=815-17+375
=815+375-17
=1190-17
=1173.
,7,递等式计算(能简便的要简便计算)
5120-6475÷37×24
25×(40+4) 67×96-67+5×67 26400÷〔360-(960÷160+154)〕 125×48 815-272÷16+375
(2)(3)根据乘法分配律简算;
(4)先算小括号里面的除法再算小括号里面的加法,然后算中括号里面的减法,最后算括号外的除法;
(5)先把48分解8×6,再运用乘法结合律简算;
(6)先算除法,再根据加法交换律简算.
(1)5120-6475÷37×24
=5120-175×24
=5120-4200
=920;
(2)25×(40+4)
=25×40+25×4
=1000+100
=1100;
(3)67×96-67+5×67
=67×(96-1+5)
=67×100
=6700;
(4)26400÷[360-(960÷160+154)]
=26400÷[360-(6+154)]
=26400÷[360-160]
=26400÷200
=132;
(5)125×48
=125×(8×6)
=125×8×6
=1000×6
=6000;
(6)815-272÷16+375
=815-17+375
=815+375-17
=1190-17
=1173.
,7,递等式计算(能简便的要简便计算)
5120-6475÷37×24
25×(40+4) 67×96-67+5×67 26400÷〔360-(960÷160+154)〕 125×48 815-272÷16+375
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