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三、计算下面各题，怎样简便就怎样计算。
用时______分 答对______题
$720÷36-12÷2$ $720÷(36-12)÷2$ $720÷[(36-12)÷2]$
$221÷13+26×14$ $23×(34-192÷12)$ $630÷[2×(36-21)]$
$75+168+25$ $233+(167+154)$ $282+47+53+118$
$135-76-24$ $445-174-145$ $798-(218+198)$
$67×5×2$ $21×125×8$ $15×(7×4)$
$(125+20)×8$ $55×23+55×77$ $201×42$
$3m6dm+7m4cm$ $5t65kg+17t90kg$ $5$元零$6$分$-3$元$8$角
$6.05+12.39+17.58$ $4.32-1.26+2.34$ $27.9-(9.46+15.76)$
$4.5+12.6+7.4$ $0.34+0.25+0.26$ $45.73-23.71-12.29$
用时______分 答对______题
$720÷36-12÷2$ $720÷(36-12)÷2$ $720÷[(36-12)÷2]$
$221÷13+26×14$ $23×(34-192÷12)$ $630÷[2×(36-21)]$
$75+168+25$ $233+(167+154)$ $282+47+53+118$
$135-76-24$ $445-174-145$ $798-(218+198)$
$67×5×2$ $21×125×8$ $15×(7×4)$
$(125+20)×8$ $55×23+55×77$ $201×42$
$3m6dm+7m4cm$ $5t65kg+17t90kg$ $5$元零$6$分$-3$元$8$角
$6.05+12.39+17.58$ $4.32-1.26+2.34$ $27.9-(9.46+15.76)$
$4.5+12.6+7.4$ $0.34+0.25+0.26$ $45.73-23.71-12.29$
答案
14 15 60 381 414 21 268 554 500 35 126 382 670 21000 420 1160 5500 8442 10.64m 22.155t 1.26元 36.02 5.4 2.68 24.5 0.85 9.73
