口算
14×5= | 20×6= | 16×50= | 39-14= | 450÷3= |
250×3= | 200-90= | 60×130= | 130×5= | 2×380= |
150×6= | 43×70= | 140×7= | 280×3= | 350×2= |
250×3= | 340×6= | 3×250= | 850×2= | 5×270= |
14×5= | 20×6= | 16×50= | 39-14= | 450÷3= |
250×3= | 200-90= | 60×130= | 130×5= | 2×380= |
150×6= | 43×70= | 140×7= | 280×3= | 350×2= |
250×3= | 340×6= | 3×250= | 850×2= | 5×270= |