分析:本題運(yùn)用運(yùn)算法則直接求解,整數(shù)加減法的題目要注意進(jìn)位和退位;小數(shù)的計算要注意小數(shù)點(diǎn)的位置;分?jǐn)?shù)的運(yùn)算要注意把結(jié)果化成最簡分?jǐn)?shù).
解答:解:
(1)66+8=74, |
(2)47-8=39, |
(3)25×4=100, |
(4)56÷4=14, |
(5)3.07÷3=, |
(6)471-299=172, |
(7)600÷5=120, |
(8)1.06×8=8.48, |
(9)6.6+4=10.6, |
(10)1-0.05=0.95, |
(11)3.8+6.2=10, |
(12)3.8÷0.19=20, |
(13)0.1+0.1÷0.1=1.1, |
(14)24×0.5=12, |
(15)1.8÷0.2=9, |
(16)1÷0.25=4, |
(17)8-0.8=7.2, |
(18)1.5×0.6=0.9, |
(19)1.5÷0.3=5, |
(20)×4=, |
(21)×=, |
(22)12÷=28, |
(23)-=, |
(24)1-=, |
(25)+=1, |
(26)×=, |
(27)+=, |
(28)-=, |
(29)÷=, |
(30)+=. |
點(diǎn)評:本題考查了基本的運(yùn)算,要注意在平時多積累經(jīng)驗,逐步提高運(yùn)算的速度和準(zhǔn)確性.