Question

直接写得数． 1 3 + 1 5 = 5 8 + 1 2 = 2.4×0.5=

直接写得数． 1 3 + 1 5 = 5 8 + 1 2 = 2.4×0.5= 0.9÷0.03= 0.45× 1 9 = 2 4 ÷ 2 5 = 5 12 × 3 10 = 0.4×0.12=

Answer 1

1 3 + 1 5 = 8 15 ， 5 8 + 1 2 = 9 8 ， 2.4×0.5=1.2， 0.9÷0.03=30， 0.45× 1 9 =0.05， 2 4 ÷ 2 5 = 5 4 ， 5 12 × 3 10 = 1 8 ， 0.4×0.12=0.048．