diff --git a/big_operation.go b/big_operation.go
index a01c05a..3aa3f47 100644
--- a/big_operation.go
+++ b/big_operation.go
@@ -7,6 +7,27 @@ func (d Decimal) Add(d2 Decimal) Decimal {
 	return mul
 }
 
+// AddFloat 加
+func (d Decimal) AddFloat(d2 float64) Decimal {
+	mul := New()
+	mul.floatValue.Add(d.floatValue, NewFloat(d2).floatValue)
+	return mul
+}
+
+// AddInt 加
+func (d Decimal) AddInt(d2 int64) Decimal {
+	mul := New()
+	mul.floatValue.Add(d.floatValue, NewInt(d2).floatValue)
+	return mul
+}
+
+// AddString 加
+func (d Decimal) AddString(d2 string) Decimal {
+	mul := New()
+	mul.floatValue.Add(d.floatValue, NewString(d2).floatValue)
+	return mul
+}
+
 // Sub 减 (d-d2)
 func (d Decimal) Sub(d2 Decimal) Decimal {
 	mul := New()
@@ -14,6 +35,27 @@ func (d Decimal) Sub(d2 Decimal) Decimal {
 	return mul
 }
 
+// SubFloat 减
+func (d Decimal) SubFloat(d2 float64) Decimal {
+	mul := New()
+	mul.floatValue.Sub(d.floatValue, NewFloat(d2).floatValue)
+	return mul
+}
+
+// SubInt 减
+func (d Decimal) SubInt(d2 int64) Decimal {
+	mul := New()
+	mul.floatValue.Sub(d.floatValue, NewInt(d2).floatValue)
+	return mul
+}
+
+// SubString 减
+func (d Decimal) SubString(d2 string) Decimal {
+	mul := New()
+	mul.floatValue.Sub(d.floatValue, NewString(d2).floatValue)
+	return mul
+}
+
 // Mul 乘 (d*d2)
 func (d Decimal) Mul(d2 Decimal) Decimal {
 	mul := New()
@@ -21,9 +63,51 @@ func (d Decimal) Mul(d2 Decimal) Decimal {
 	return mul
 }
 
+// MulFloat 乘
+func (d Decimal) MulFloat(d2 float64) Decimal {
+	mul := New()
+	mul.floatValue.Mul(d.floatValue, NewFloat(d2).floatValue)
+	return mul
+}
+
+// MulInt 乘
+func (d Decimal) MulInt(d2 int64) Decimal {
+	mul := New()
+	mul.floatValue.Mul(d.floatValue, NewInt(d2).floatValue)
+	return mul
+}
+
+// MulString 乘
+func (d Decimal) MulString(d2 string) Decimal {
+	mul := New()
+	mul.floatValue.Mul(d.floatValue, NewString(d2).floatValue)
+	return mul
+}
+
 // Quo 除 (d/d2)
 func (d Decimal) Quo(d2 Decimal) Decimal {
 	mul := New()
 	mul.floatValue.Quo(d.floatValue, d2.floatValue)
 	return mul
 }
+
+// QuoFloat 除
+func (d Decimal) QuoFloat(d2 float64) Decimal {
+	mul := New()
+	mul.floatValue.Quo(d.floatValue, NewFloat(d2).floatValue)
+	return mul
+}
+
+// QuoInt 除
+func (d Decimal) QuoInt(d2 int64) Decimal {
+	mul := New()
+	mul.floatValue.Quo(d.floatValue, NewInt(d2).floatValue)
+	return mul
+}
+
+// QuoString 除
+func (d Decimal) QuoString(d2 string) Decimal {
+	mul := New()
+	mul.floatValue.Quo(d.floatValue, NewString(d2).floatValue)
+	return mul
+}
diff --git a/version.go b/version.go
index 7876fb0..ed0afb0 100644
--- a/version.go
+++ b/version.go
@@ -1,3 +1,3 @@
 package godecimal
 
-const Version = "1.0.4"
+const Version = "1.0.5"