考點(diǎn):分?jǐn)?shù)的加法和減法,分?jǐn)?shù)乘法,分?jǐn)?shù)除法,分?jǐn)?shù)的四則混合運(yùn)算,小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法
專題:運(yùn)算順序及法則,運(yùn)算定律及簡(jiǎn)算
分析:(
+
)×6運(yùn)用乘法分配律簡(jiǎn)算;
(18-
)÷9先把除法變成乘法,再運(yùn)用乘法分配律簡(jiǎn)算;
20÷
÷
根據(jù)除法的性質(zhì)簡(jiǎn)算;
+
+
根據(jù)加法交換律簡(jiǎn)算;
-(
-
)根據(jù)減法的性質(zhì)簡(jiǎn)算;
4.5×4.4+4.6×4.5根據(jù)乘法分配律簡(jiǎn)算;
其它題目根據(jù)運(yùn)算法則直接求解.
解答:
解:
48×=36 | 25÷=30 | 6+=6 | ÷= | ×4= |
÷= | 9×= | 8÷=20 | ÷=4 | -= |
×= | -= | ÷5= | ÷= | ×= |
91.5÷=152.5 | 2÷=5 | 0÷=0 | 12×=10 | 0.4÷=1 |
÷= | ×= | ×9= | ÷4= | 4.4×0.5=2.2 |
6.4+0.43=6.83 | 3.14×22=12.56 | 3.14×102=314 | 0.63÷0.7=0.9 | 2.4÷0.8=3 |
4×25%=1 | 1-75%=0.25 | 0.5×30%=0.15 | 7.2-0.4=6.8 | 3.4÷1.7=2 |
0.18÷0.2=0.9 | 9.42÷3.14=3 | 21.98÷3.14=7 | 2-2÷9=1 | ×= |
×4×= | (+)×6=5 | (18-)÷9=1 | 20÷÷=30 | 8.8÷0.25=35.2 |
++=1 | -(-)= | 4.5×4.4+4.6×4.5=40.5 |
點(diǎn)評(píng):本題考查了簡(jiǎn)單的運(yùn)算,要注意根據(jù)運(yùn)算法則和運(yùn)算定律快速準(zhǔn)確的得出答案.