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
57 + 20 = ______
63 + 20 = ______
72 + 10 = ______
89 + 10 = ______
21 + 10 = ______
42 − 10 = ______
7 × 10 = ______
52 + 20 = ______
98 − 10 = ______
87 − 10 = ______
12 + 20 = ______
22 + 20 = ______
65 − 10 = ______
76 − 10 = ______
14 + 20 = ______
5 × 10 = ______
19 + 10 = ______
1 × 10 = ______
68 − 10 = ______
43 + 20 = ______
