Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
51 − 10 = ______
39 − 10 = ______
32 − 10 = ______
63 + 20 = ______
50 + 20 = ______
17 + 10 = ______
43 + 20 = ______
8 × 10 = ______
13 + 20 = ______
81 − 10 = ______
34 − 10 = ______
28 + 20 = ______
36 + 20 = ______
42 + 10 = ______
85 − 10 = ______
56 + 10 = ______
5 × 10 = ______
75 + 20 = ______
89 + 20 = ______
42 + 20 = ______
