1、 - = - = + = + = -= - = + = + = + 2 = 1 - = += += += -= -= -= += -= 1- = -= -= += -= += += += += -= += -= += -=
2、+= += -= += -= 7-= + = -= += += += -= 5-= += -= -= 5- = 1--= + = + = 2 +
3、 -0.25= += + = + = + = += -= 0.74+ = 0.375+ -= += 1-= += += + =
4、 1-= -= + = - = - = + = 1 - = + = - = += += += += 1-= -= - = + = + = + =
5、 += -= -= -= += -= 1-= += -= += +5= 5-= 0.32= 12.5×8= 8÷0.4= 2.5×4= 7-6.38= 36÷0.9 = 5÷0.001 = 13×60 = 0.8÷0.02 = 0.36+1.5
6、4= 135÷5= 0.6×2= 4.8÷0.6= 1.7+3= 0.7÷3.5= 1.25×16= 9.6÷32= 2-0.09= 26.26÷26= 4.57+6.43= 5÷0.001= 2.5×4= 0.48÷120= 1.01×99= 4.3-1.6= 0.9×7= 0.6+7= 0.22×0.5= 1.25×8= 0.9×100=
7、 0.64÷16= 10-9.12= 0.8×125= 3.2+1.78= 四、计算下面各题,能简算的要简算。 8.5-0.24-1.76 7.9×11-7.9 3.14×32 7.5-(2.5+3.8) 5×1.4 - 0.4×5 0.8×125-10 10-4.8-3.2 7.8×1.17-7.8×0.17 2.65×1.7+1.35×1.7 2.7×2-0.45 0.25×101
8、 3.25×27+73×3.25 38.7-7.84÷1.4 8.8-2.5×1.8 4×9×0.25 1.25×0.25×3.2 78-8.5+22-0.5 15-5÷12- + - = - + = + - + ) 0.25+ + + + + 10- - -+ -(+) +- +- +(+)
9、 +- -(+) 6-(-) - ( + ) + + ++= +-= - + 25 - - + - - ( - ) 5-- + - + + +(-) +(-) ++
10、 ++ -(+) 2--= ++= 1--= 1--= ++= ++ + += +++ +++ -(+) 3 - - - -+ +- 1-+ +﹙-﹚ 2-﹙+﹚ 15-5+7 1-﹙3-1﹚ 1.875-﹙0.25+﹚ --= +-= ++= ++= 1--=
11、 ++ ++ 4-- -(+) -++ 2-- - 0.8++0.2 -( -) +(-) 2-- +- -+ -- ++ +- 3–(- ) 6-(-) ++ 4.8+ +1.2 +++ -+- +++
12、 +++ + -(- ) + -(+ ) + - + -++ -+- + + + +++ -(-) -(-) +- -+- +- -+ 1-- +
13、 + +- ++ +(-) -+ -(+) -(-) 5-- +(-) 3-(+ ) -(-) 2--= -+ -(-) -(+) -+ 10-(+) -+ + - + = (+)-(-) ---
14、 +++-- -(-)+-(+) 解方程 2x+=4.625 + x = X+= X + = +x = x + = χ+= +X= + + x = x +( + )=2 x+0.75- =0.15 x+16 = 35 0.5+4.5x=45.5 X÷4.5 = 20
15、 5x-3x= 3.2 5.5X-3X=15 X-= 2X-=1- 3x-29 =19 2.7X-1.6 = 38.9 x- = x - = χ- = + X-+= 4x - =2- 8χ-9.1=22.9 3x-14×2 =11 8X-0.75×5=0.25 3.8x-0.8x=27 -x= -x= -x= - x= -X= 3×2-6x = 4.2 6 / 6






