127+38= 8.8÷0.2= 2-1 = ×1 =
1÷7+ = 1-1× = + = 1.02-0.43=
÷25%× = ×2÷ ×2=
①9 -(3 +0.4)
②1.8× +2.2×25%
③
①6.25-40÷16×2.5
② +(4 -3 )÷
③(8 -10.5× )÷4
④2 ÷[5 -4.5×(20%+ )]
某工厂2001年1——4季度产值统计图
问题1:
列式:
问题2: