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
99 − 10 = ______
79 − 10 = ______
68 + 10 = ______
47 + 10 = ______
63 + 20 = ______
19 + 20 = ______
69 + 20 = ______
9 × 10 = ______
71 + 10 = ______
42 − 10 = ______
36 + 20 = ______
52 + 20 = ______
50 − 10 = ______
41 − 10 = ______
89 + 20 = ______
67 − 10 = ______
44 + 10 = ______
48 + 20 = ______
59 − 10 = ______
15 + 10 = ______
