diff --git a/src/styles/components/input-number.less b/src/styles/components/input-number.less
index 3b5d8f5f5..20e3feb6f 100644
--- a/src/styles/components/input-number.less
+++ b/src/styles/components/input-number.less
@@ -54,7 +54,7 @@
     &-handler {
         display: block;
         width: 100%;
-        height: @input-height-base / 2;
+        height: (@input-height-base / 2);
         line-height: 0;
         text-align: center;
         overflow: hidden;
@@ -125,7 +125,7 @@
             height: @input-height-large;
         }
         .@{input-number-prefix-cls}-handler {
-            height: @input-height-large / 2;
+            height: (@input-height-large / 2);
         }
 
         input {
@@ -147,7 +147,7 @@
             height: @input-height-small;
         }
         .@{input-number-prefix-cls}-handler {
-            height: @input-height-small / 2;
+            height: (@input-height-small / 2);
         }
 
         input {
diff --git a/src/styles/components/layout.less b/src/styles/components/layout.less
index ceced165b..7a7a6ad93 100644
--- a/src/styles/components/layout.less
+++ b/src/styles/components/layout.less
@@ -82,7 +82,7 @@
                 line-height: @layout-zero-trigger-height;
                 background: @layout-sider-background;
                 color: #fff;
-                font-size: @layout-zero-trigger-width / 2;
+                font-size: (@layout-zero-trigger-width / 2);
                 border-radius: 0 @border-radius-base @border-radius-base 0;
                 cursor: pointer;
                 transition: background .3s ease;
diff --git a/src/styles/components/split.less b/src/styles/components/split.less
index 6d3a1e5c3..cd92c1163 100644
--- a/src/styles/components/split.less
+++ b/src/styles/components/split.less
@@ -4,7 +4,7 @@
 @trigger-background: #f8f8f9;
 @trigger-width: 6px;
 @trigger-bar-width: 4px;
-@trigger-bar-offset: (@trigger-width - @trigger-bar-width) / 2;
+@trigger-bar-offset: ((@trigger-width - @trigger-bar-width) / 2);
 @trigger-bar-interval: 3px;
 @trigger-bar-weight: 1px;
 @trigger-bar-con-height: (@trigger-bar-weight + @trigger-bar-interval) * 8;
diff --git a/src/styles/components/time-picker.less b/src/styles/components/time-picker.less
index 9f76f18af..f06f7f339 100644
--- a/src/styles/components/time-picker.less
+++ b/src/styles/components/time-picker.less
@@ -141,7 +141,7 @@
                 &-with-seconds{
                     min-width: @time-picker-cells-width-with-date-with-seconds;
                     .@{time-picker-prefix-cls}-cells-list{
-                        width: @time-picker-cells-width-with-date-with-seconds / 3;
+                        width: (@time-picker-cells-width-with-date-with-seconds / 3);
                         ul{
                             li{
                                 padding: 0 0 0 28px;
@@ -150,7 +150,7 @@
                     }
                 }
                 &-list {
-                    width: @time-picker-cells-width-with-date-with-seconds / 2;
+                    width: (@time-picker-cells-width-with-date-with-seconds / 2);
                     max-height: 216px;
                     &:first-child{
                         border-radius: 0;