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
9 × 10 = ______
78 − 10 = ______
14 + 20 = ______
98 − 10 = ______
33 + 10 = ______
28 + 20 = ______
27 + 20 = ______
2 × 10 = ______
5 × 10 = ______
20 + 10 = ______
97 − 10 = ______
70 + 10 = ______
87 + 20 = ______
1 × 10 = ______
19 + 20 = ______
64 + 10 = ______
70 + 20 = ______
8 × 10 = ______
82 − 10 = ______
70 − 10 = ______
