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 = ______
71 + 20 = ______
86 + 10 = ______
75 − 10 = ______
21 + 20 = ______
4 × 10 = ______
41 − 10 = ______
7 × 10 = ______
27 + 10 = ______
3 × 10 = ______
17 + 10 = ______
27 + 20 = ______
99 − 10 = ______
64 + 20 = ______
90 − 10 = ______
82 + 10 = ______
25 + 10 = ______
14 + 20 = ______
84 − 10 = ______
67 − 10 = ______
