口算真简单，直接填一填。2.3+6.

口算真简单，直接填一填。1B-`+p0x4u3I8X

2.3+6.7=5m:q7i+A,b)S0]9k2~ 25×40=.D.k.K+A3_1b2O*|9B8I.F1B-`+p0x4u3I8X

30.5+1.8=:A1T,F)`'S8m;} 10.5-5.5=;I4Z,[9u7M3K1B-`+p0x4u3I8X

4.4-0.3=9p1b6C/N*@;o9r3m3j1Q,L.f+^4^/J7X 160×30='})b0|9R4x1@1B-`+p0x4u3I8X

20×50=(t/J9{8]7{8U5L)b0v 170×50=/s1x;|(c*h'I)L'm5t)^1B-`+p0x4u3I8X