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
49 + 20 = ______
57 + 20 = ______
84 − 10 = ______
21 + 20 = ______
78 + 20 = ______
39 − 10 = ______
9 × 10 = ______
90 − 10 = ______
34 + 10 = ______
72 + 10 = ______
46 + 20 = ______
27 + 20 = ______
60 + 10 = ______
8 × 10 = ______
37 + 10 = ______
99 − 10 = ______
14 + 20 = ______
6 × 10 = ______
92 − 10 = ______
4 × 10 = ______
