453+198= 10-0.03= 3.4×
110= 0.1÷0.01= 4×0.025= 13÷1315= 4.5-0.75-14= 5×4÷5×4=
0.1÷0.01= 9600÷800= 7.5×(7.5—6又1/2)= 5.4+1又2/5= 0.23= 9.7+0.03 = 78×9.9+7.8= 2-0.2%= 45×0÷0.18= 45 +43 = 1-15×4+4×15= 0.18÷0.2=
3500-700= 0.4×0.2= 9-0.9= 24÷2/11= 204÷2= 1/2+1/3= 2/5+7/8= 0.9+99×0.9= 56+37= 80-16= 31.5+5= 12-1.1= 1.2×0.2=
2.87÷0.7= 30÷50= 25×8= 127+38= 8.8÷0.2= 2-1/4 = 12×1/3 = 1÷7+2 = 1-1×1/4= 1.02-0.43= 1÷25%×25=
142-69= 0.56÷8= 6.4+3355= 1.2×6=
5.4+9= 0.6×0.6= 71255÷0.8= 43-412=
315-15326-6= 75×5×7= 542+1358 = 0.52 = 0.4×0.05 = 9.6÷0.03 =
8×26×25 = 1÷(1÷4)= 15-(-6)= 1-13-15 =
14÷56×58 = (+17)-(-8)=
121+37+2133 = 1-54 = 10-0.01 = 5÷5 =
(16-19)×18 = 1124÷1724 = 2.4÷1% = 119721×11×3 =
脱式计算。(10分)
4050630042 5.04×6.5–2.76 17537175 1010 13145634 8571 15693
(1)1.8×(4.7-3.87÷0.9) (2)8又1/2×8.5+1
又1/2×8.5
(3)9.72×1.6-18.305÷7 (3)5.97+3.8×7.2-24.6=
(67-25)÷135 78×0.375+388÷9
1.5 ×8.4 + 3 × 0.3 + 15 ×10% 30×(
25+16-415)
73363741313 × 4 + 4 × 13 7 ÷ 11 + 7 ÷ 7
11 17.6×102-10.5×165
4×0.8×2.5×12.5 0.65×14+87×65%-65% 5000-6720÷28×107
757÷625-27×71138 [1÷(0.75+3)]×24
42÷[14-(50-39)] 2.25×4.8+77.5×0.48
①9 -0.64-0.36 ②1.8×1/4+2.2×25% ③6.25-40÷16×2.5
①308×16-14874÷37 ②(10/3 +3/4 -21/8 )×1
③3.5÷5/8 ×5/15 ④0.8×2.7+7.3÷15/4 ⑤9.8÷[28×(1-1/7 )+27/5 ]
①49÷(56-12)×(78-12) ② 95116×4.25+44×6 ③34-0.6×(2513112-1.75) ④(62-34)÷(13+115)
⑤(2.5-0.125)×0.8+6.24 ⑥ 3÷
133÷4÷4
1375+450÷18 (36×17-12)÷15 (2.5-0.125)×0.8+6.24
28×[(201-77)] 35÷[(-1126-3)×6]
3、求未知数x。(12分)
15x = 54 0.6x+3×2.5 = 67.5
X-18%=65.6 X-30%X=280 1-25X=14 120%x+x =44
15x = 54 0.6x+3×2.5 = 67.5
4(x+0.2)= 1.2 x×(123+5)= 67.5
4(x+0.2)= 1.2 x×(13+25)= 67.5 2x+3×0.9=24.9
2/3X + 3/4X=3又2/5 3又1/2÷X=1又1/3 7.5:x=24:12 3x-6 =8.25
①12 -4x=2 ②38:x=4.75:1 ③1/3 x+5/6 x=1.4
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