直接寫出得數(shù).
3
8
×
2
3
=
3.7+2.5= 51÷0.25= 1.1-0.11=
2
3
÷
5
6
=
68÷0.4=
3
8
×
5
3
=
3.27+7.3=
3
8
×6=
4
7
×
7
4
=
627-198= 0.1÷50%=
3
10
×15=
9-
3
11
=
10-2
1
3
=
3.8×0.1=
1
2
×
3
10
=
1
3
÷50%=
1
2
×40%=
12%+25%=
0.8÷3= 280÷35= 359+199= 120%-70%=
1.4×45= 40÷10%= 241-103= 324-198=
2-1.36=
1
2
-
1
3
=
33÷
11
10
=
0.62+0.4=
0.37-0.3= 0.66÷0.3 100×0.48= 5x-3x=
35÷100= 0.4×0.5=
3
8
-
3
8
=
0.23÷0.1=
1-
8
11
=
0.8π= 1-90%= 1+
3
8
=
3
4
÷6=
分析:5x-3x根據(jù)乘法分配律計(jì)算;0.8π把π看成3.14,再計(jì)算;其它題目根據(jù)運(yùn)算法則直接求解.
解答:解:
3
8
×
2
3
=
1
4
3.7+2.5=6.2, 51÷0.25=204, 1.1-0.11=0.99,
2
3
÷
5
6
=
4
5
,
68÷0.4=170,
3
8
×
5
3
=
5
8
,
3.27+7.3=10.57,
3
8
×6=
9
4
,
4
7
×
7
4
=1,
627-198=429, 0.1÷50%=0.2,
3
10
×15=
9
2
,
9-
3
11
=8
8
11
10-2
1
3
=7
2
3
,
3.8×0.1=0.38,
1
2
×
3
10
=
3
20
,
1
3
÷50%=
2
3
,
1
2
×40%=
1
5
,
12%+25%=0.37,
0.8÷3=
4
15
,
280÷35=8, 359+199=558, 120%-70%=0.5,
1.4×45=63, 40÷10%=400, 241-103=138, 324-198=126,
2-1.36=0.64,
1
2
-
1
3
=
1
6
,
33÷
11
10
=30,
0.62+0.4=1.02,
0.37-0.3=0.07, 0.66÷0.3=2.2, 100×0.48=48, 5x-3x=2x,
35÷100=0.35, 0.4×0.5=0.2,
3
8
-
3
8
=0,
0.23÷0.1=2.3,
1-
8
11
=
3
11
,
0.8π=2.512, 1-90%=0.1, 1+
3
8
=1
3
8
,
3
4
÷6=
1
8
點(diǎn)評(píng):本題屬于基本的計(jì)算,在平時(shí)都積累經(jīng)驗(yàn),逐步提高運(yùn)算的速度和準(zhǔn)確性.
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