(2.5+0.8)×0.4 1.82×(99+1)2.7×4.6+5.4×2.7 2.5×0.4+0.8×0.41.82×99+1.82 0.76×(4×2.5)0.76×4×2.5 (4.6+5.4)×2.7.
5×4= 6.4÷0.8=7.2×0.01= 10÷4= 0.36×2= 1÷0.125= 0.25×8= 8.1÷0.3= 0.1×0.02= 1.6÷16= 2.4×2.5= 3.2÷1.6= 1.5+0.25×4= 3.5+7.6= 3×0.2×0.5=
2.26×375 90×290 4500÷80.
直接写得数. (1)1.3×0.2=(2)0.4÷8=(3)3.2﹣2.9=(4)0.24×3=(5)12.5+0.5= (6)0.25×4=(7)12.5×0.8=(8)1.3×30=(9)2﹣0.98=(10)8.4+3=
口算. 8.6﹣5.4= 0.06+3.42= 7.6+4.2= 1.06+9.4= 125×88= 4.85﹣3.25= 7.012×100= 704.5÷1000= 10﹣2.3= 25×16=
口算. 8.6﹣4= 6.6+1.3= 0.7×10= 2.8÷100= 2.5×7×4= 0÷234= 0.23+1.77= 9﹣0.1= 0.26×100= 9.3+4.5﹣7.3=